CVE-2026-61721
CVE-2026-61721 · FluidSynth: Heap-based buffer overrun for DLS samples
This page contains facts from public vulnerability sources. Check the original advisory before updating.
FluidSynth is a software synthesizer based on the SoundFont 2 specifications. From 2.5.0 until 2.5.6, the native DLS loader assigns file-controlled wsmp.loop_start and wsmp.loop_length values to samples without calling fluid_sample_validate() or fluid_sample_sanitize_loop(). A crafted DLS file can place sample loop points beyond the sample buffer, causing out-of-bounds reads during audio rendering, undefined behavior, possible memory disclosure, and denial of service. Builds compiled with the CMake option enable-native-dls set to OFF do not expose the affected parser. This issue is fixed in version 2.5.6.
CVSS 8.0 · High · EPSS 0.2% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
fluidsynth
- Versions
- >= 2.5.0, < 2.5.6: Affected
No fix published
fluidsynth Debian:14
- Versions
- 2.4.4+dfsg-1
- 2.4.6+dfsg-1
- 2.4.7+dfsg-1
- 2.4.7+dfsg-2
- 2.4.8+dfsg-1
- 2.5.0+dfsg-1
- 2.5.1+dfsg-1
- 2.5.1+dfsg-2
- 2.5.2+dfsg-1
- 2.5.3+dfsg-1
- 2.5.4+dfsg-1
- 2.5.5+dfsg-1
- 2.5.5+dfsg-2
- Affected ranges
- ECOSYSTEM: < 2.5.6+dfsg-1
Update to 2.5.6+dfsg-1